Just bought a 08 Tundra SR5 Dbl cab with 6.5 bed and 5.7 eng with tow package. Tow cap of 10,300 lbs. Bought it to pull a 5th wheel trailer. I was told that as soon as you put a 5th wheel in the bed you have voided the warranty. I have a full warranty, the truck only has 8,000 miles. Will it void my warranty?